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Adsorption of U(VI) on bentonite in simulation environmental conditions
Wang, Jiaquan1; Chen, Zhi1; Shao, Dadong2; Li, Yuying3; Xu, Zimu1; Cheng, Cheng2; Asiri, Abdullah M.4; Marwani, Hadi M.4; Hu, Shuheng1
2017-09-01
Source PublicationJOURNAL OF MOLECULAR LIQUIDS
Volume242Issue:Pages:678-684
AbstractThe bentonite derived from Huangshan County was used as adsorbent for the adsorption of uranium (U(VI)). The effect of environmental factors, such as contact time, pH, ionic strength, HA and reaction temperature, on U(VI) adsorption on bentonite surface was investigated in detail. The adsorption capability of bentonite for U(VI) is obviously rest with pH value and ionic strength. The presence of HA in solution strongly enhance and reduce the adsorption of U(VI) on bentonite at low and high pH, respectively. The Langmuir and Freundlich models were applied to simulate the adsorption isotherms of U(VI) at three different temperatures of 298 +/- 1, 318 +/- 1 and 338 +/- 1 K, respectively. The thermodynamic parameters (Delta H-0, Delta G(0) and Delta S-0) calculated from the temperature-dependence adsorption isotherms indicates that U(VI) adsorption on bentonite is an endothermic and spontaneous process. At pH < 7, the adsorption of U(VI) was dominated by the outer-sphere surface complexation and ion exchange with H+/Na+ on bentonite surfaces; At pH > 7, the inner-sphere surface complexation was the main adsorption mechanism. Based on the experimental analysis results, bentonite is an appropriate material for the enrichment and solidification of U(VI) ions. The results are important for the radioactive waste management. (C) 2017 Published by Elsevier B.V.
SubtypeReview
Keywordu(Vi) Bentonite Ha Radioactive Waste Management Adsorption
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872) ; NSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872)
DOI10.1016/j.molliq.2017.07.048
WOS KeywordHUMIC-ACID ; AQUEOUS-SOLUTIONS ; IONIC-STRENGTH ; SORPTION BEHAVIOR ; ENHANCED REMOVAL ; FACILE SYNTHESIS ; NUCLEAR-ENERGY ; PH ; CLAY ; TEMPERATURE
Indexed BySCI
Language英语
Funding OrganizationNSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872) ; NSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872)
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000412607300074
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/33779
Collection中科院等离子体物理研究所
Affiliation1.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
3.Wuyi Univ, Sch Chem & Environm Engn, Jiangmen 529020, Peoples R China
4.King Abdulaziz Univ, Chem Dept, Fac Sci, Jeddah 21589, Saudi Arabia
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GB/T 7714
Wang, Jiaquan,Chen, Zhi,Shao, Dadong,et al. Adsorption of U(VI) on bentonite in simulation environmental conditions[J]. JOURNAL OF MOLECULAR LIQUIDS,2017,242(无):678-684.
APA Wang, Jiaquan.,Chen, Zhi.,Shao, Dadong.,Li, Yuying.,Xu, Zimu.,...&Hu, Shuheng.(2017).Adsorption of U(VI) on bentonite in simulation environmental conditions.JOURNAL OF MOLECULAR LIQUIDS,242(无),678-684.
MLA Wang, Jiaquan,et al."Adsorption of U(VI) on bentonite in simulation environmental conditions".JOURNAL OF MOLECULAR LIQUIDS 242.无(2017):678-684.
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